CN101560992A - Two-blade impeller - Google Patents
Two-blade impeller Download PDFInfo
- Publication number
- CN101560992A CN101560992A CNA2009100689282A CN200910068928A CN101560992A CN 101560992 A CN101560992 A CN 101560992A CN A2009100689282 A CNA2009100689282 A CN A2009100689282A CN 200910068928 A CN200910068928 A CN 200910068928A CN 101560992 A CN101560992 A CN 101560992A
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- China
- Prior art keywords
- blade
- impeller
- cup
- wheel hub
- relief hole
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Abstract
The invention relates to a two-blade impeller, which comprises a wheel hub, a front cup, a rear cup, a front cover plate and a rear cover plate, wherein the rear cup and the front end of the wheel hub form a cup-shaped chamber; the rear cover plate of the wheel hub is provided with a blade pressure relief hole in the radial direction, or a blade is coaxially and fixedly arranged on the front end of the impeller, and a pressure relief hole is formed between the blade and the rear cover plate of the wheel hub; and the blade pressure relief hole is communicated with the cup-shaped chamber. The innovated mode of the wheel hub of the impeller is similar to the formation of a blade structure on the front end of the impeller. The two-blade impeller has a simple integral structure and scientific design, solves the problems which are difficult to solve in the prior multi-stage pump, promotes the scientific and technological progress of pumps, and is a technical invention with high innovation.
Description
Technical field
The invention belongs to the pump technical field, relate to impeller, especially a kind of two blade impeller.
Background technique
Multistage centrifugal pump is carried liquid by centrifugal action when rotating, its reaction force can be applied on the pump shaft, makes pump shaft can produce bigger axial force, and this axial force can promote impeller and produce axial displacement, cause the pump delivery efficiency to reduce, therefore elimination or this axial force of balance are very necessary.In existing multistage centrifugal pump, the method for balancing axial thrust mainly contains two kinds: 1, adopt the Balance disc balancing axial thrust, and its mounting process complexity, and gimbal is easy to generate friction and the disequilibrium ability with Balance disc, even the working life of shortening pump; 2, adopt the relief hole balancing axial thrust, promptly on the wheel hub of impeller, make a relief hole that is communicated with the formed closed chamber of upper level blade, this relief hole is coaxial with pump shaft, when wheel rotation, axial force can make cup-shaped indoor hydraulic pressure raise, through this relief hole water is discharged, thereby discharge axial force.But also there is critical defect in this mode, i.e. relief hole outlet is over against the water outlet of impeller, and the flowing pressure of current has been resisted the outflow of water in the relief hole, so the effect of balancing axial thrust is relatively poor.
By retrieval, three pieces of patent documentations relevant have been found with present patent application, one: a kind of axial force in multi-stage centrifugal pump equilibrium structure (patent No. 200520022494.X), on the high pressure water extrusion locular wall of pump, have a high pressure water irrigating gate, leave certain interval between Balance disc and the gimbal, form a pressure chamber, the close palace of the U type runner that the outside, pressure chamber has the control high pressure water to flow out, the close palace of U type runner is connected with backwater cavity, an outlet pipe is arranged on the backwater cavity, the water pipe that goes out is connected with return pipe, and return pipe is connected with the water intake of pump again.Its two: a kind of novel axial thrust balancing device centrifugal pump (patent No. 200820010010.3), leading portion, stage casing, back segment and impeller by the pump housing, pump cover or the multistage pump of single-stage pump are formed, position that its described impeller cover cylindrical is corresponding with the pump housing, pump cover or back segment or the throttling seal ring that is provided with respectively at its corresponding position, form the radial clearance that reduces leaking medium, the circle and the pump housing, pump cover or back segment corresponding position or the Balance disc that is provided with respectively at its corresponding position, balance plate form the axial clearance of adjustable and balancing chamber pressure in it.Above-mentioned two patents all belong to the Balance disc mode, still exist the problem of complex process, counterbalance effect difference.Its three: axial force balance submersible pump (patent No. 92244801.9), be on the basis of existing submersible pump, pump is divided into two-part up and down, be provided with two-way water inlet joint up and down between the pump, the liquid two-way water inlet joint of flowing through enters respectively up and down in the pump, and what enter pump upwards is delivered to outfall sewer step by step; Enter down being delivered to down step by step of pump downwards and pump the mouth of a river, through side pipe or send into outfall sewer or send into the pump water inlet mouth, its effect be equivalent to up and down pump and or series connection use.Owing to pump impeller opposing side setting up and down, therefore can make axial force reach balance by the progression of pump about adjusting, shortcoming is a complex structure, and cost is higher, and pump efficiency is lower.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the two blade impeller of a kind of simple in structure, design science, good balance effect is provided.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of two blade impeller, impeller comprise wheel hub, preceding cup, back cup, front shroud, back shroud, form doughnut between back cup and the wheel hub, wherein radially are shaped on a blade relief hole on the back shroud of wheel hub, and this blade relief hole is communicated with cup-shaped chamber.
And described blade relief hole is backward vane or prismatic blade form.
A kind of two blade impeller, impeller comprise wheel hub, preceding cup, back cup, front shroud, back shroud, wherein at the coaxial blade that installs of the front end of impeller, form relief hole between the back shroud of this blade and wheel hub, and this relief hole is communicated with cup-shaped chamber.
And described blade is reverse or prismatic blade.
Advantage of the present invention and beneficial effect are:
1, the present invention makes progress former impeller hub spindle to the footpath of made relief hole built in wheel hub, and this relief hole is backward vane or prismatic blade form, after the water pump vane assembling, cup-shaped chamber of impeller and pump case doughnut form closed chamber, because of the high pressure water in the formed closed chamber of axial force can flow out smoothly by this relief hole, but the axial force of complete equilibrium pump shaft.
2, the present invention is at the innovation form of impeller hub, and the front end that is similar at impeller forms a blade structure, and overall structure is simple, design science, having solved the insoluble drawback that exists in the existing multistage pump, promoted the scientific and technological progress of pump class, is the higher technological invention of a kind of novelty.
Description of drawings
Fig. 1 is a structure sectional view of the present invention;
Fig. 2 is the structure sectional view of another embodiment of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing, by specific embodiment, and following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
Embodiment 1: referring to Fig. 1.
A kind of two blade impeller, impeller 1 comprise wheel hub 2, preceding cup 7, back cup 3, front shroud 6, back shroud 4, the cup-shaped chamber that circularizes of impeller hub and deutostoma; This blade wheel structure shown in Fig. 1 is the basic structure of present impeller, therefore no longer specifically describes in detail.
Innovative point of the present invention is:
Radially be shaped on a blade relief hole 5 on the back shroud of wheel hub, this blade relief hole is backward vane or prismatic blade form, and is communicated with cup-shaped chamber.
The blade relief hole is designed to the backward vane form, and with even more ideal the flowing of liquid stream formation of impeller, counterbalance effect is better.
Embodiment 2: referring to Fig. 2.
Front end at impeller axially installs a blade 8, forms relief hole 9 between the back shroud of this blade and wheel hub, and blade is reverse or prismatic blade, also is communicated with cup-shaped chamber.
Present embodiment is compared more simple on manufacturing process with embodiment 1.
Other are same as embodiment 1.
Claims (4)
1, a kind of two blade impeller, impeller comprises wheel hub, preceding cup, back cup, front shroud, back shroud, form doughnut between back cup and the wheel hub, it is characterized in that: radially be shaped on a blade relief hole on the back shroud of wheel hub, this blade relief hole is communicated with cup-shaped chamber.
2, two blade impeller according to claim 1 is characterized in that: described blade relief hole is backward vane or prismatic blade form.
3, a kind of two blade impeller, impeller comprise wheel hub, preceding cup, back cup, front shroud, back shroud, and it is characterized in that: at the coaxial blade that installs of the front end of impeller, form relief hole between the back shroud of this blade and wheel hub, this relief hole is communicated with cup-shaped chamber.
4, two blade impeller according to claim 3 is characterized in that: described blade is reverse or prismatic blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100689282A CN101560992A (en) | 2009-05-19 | 2009-05-19 | Two-blade impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100689282A CN101560992A (en) | 2009-05-19 | 2009-05-19 | Two-blade impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101560992A true CN101560992A (en) | 2009-10-21 |
Family
ID=41219926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100689282A Pending CN101560992A (en) | 2009-05-19 | 2009-05-19 | Two-blade impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101560992A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338121A (en) * | 2011-10-31 | 2012-02-01 | 永济新时速电机电器有限责任公司 | High-efficiency motor external fan |
| CN106050518A (en) * | 2016-07-29 | 2016-10-26 | 浙江临海浙富电机有限公司 | Pump turning direction hydraulically-started reversible water turbine and work method thereof |
| CN109538491A (en) * | 2018-10-30 | 2019-03-29 | 浙江水利水电学院 | A kind of centrifugal multistage pump multiple centrifugal pump and its installation method with inducer |
-
2009
- 2009-05-19 CN CNA2009100689282A patent/CN101560992A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338121A (en) * | 2011-10-31 | 2012-02-01 | 永济新时速电机电器有限责任公司 | High-efficiency motor external fan |
| CN106050518A (en) * | 2016-07-29 | 2016-10-26 | 浙江临海浙富电机有限公司 | Pump turning direction hydraulically-started reversible water turbine and work method thereof |
| CN106050518B (en) * | 2016-07-29 | 2018-06-19 | 浙江临海浙富电机有限公司 | It pumps rotation direction waterpower and starts the reversible hydraulic turbine and its method of work |
| CN109538491A (en) * | 2018-10-30 | 2019-03-29 | 浙江水利水电学院 | A kind of centrifugal multistage pump multiple centrifugal pump and its installation method with inducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20091021 |